body{
    background:#f8fafc!important;
}
.bgfff{
    background:#fff !important;
}
.container{
    width:1200px;
    margin-left:auto;
    margin-right:auto;
}
#header{
    width:100%;
    display:block;
    height:65px;
    box-shadow: 0 4px 8px 0 rgba(7,17,27,.1);
    font-size:14px;
    background:#fff;
    margin-bottom:20px;
    position: fixed;
    top: 0;
    z-index: 10;
}
#nav{
    width: 1200px;
    box-sizing: border-box;
    padding:0 15px;
    display:block;
    margin: 0px auto;
    height:65px;
}

/* logo */
#logo{
    float:left;
    margin-top: 10px;
}
#logo a{
    display:block;
    width:auto;
    height:45px;
    background: 0 0!important;
    text-indent: 0!important;
}
#logo img{
    height:45px;
}

/* 头部登录 */
#login-area{
    float:right;
    height:65px;
    line-height: 65px;
}
#login-area a{
    border:1px solid #5a5a5a;
    border-radius:4px;
    padding:6px 18px;
    color:#5a5a5a;
    text-decoration: none;
    transition: all .3s;
}
#login-area a:hover{
    color:#e22027;
    border-color:#e22027
}
.signup-btn{
    margin-left:10px;
}
/* 登录用户区域 */
#user-area{
    float:right;
    height:65px;
    line-height: 65px;
}
#user-area a{
    color:#5a5a5a;
    text-decoration: none;
    padding:0 15px;
    display: block;
    box-sizing: border-box;
    float: left;
    height:65px;
}
#user-area a.user-btn{
    padding:2px 15px;
}
#user-area a.user-btn i{
    font-size:20px;
}
#user-area a:hover{
    background: #5a5a5a;
    color:#fff;
}
/* 搜索框 */
#search-area{
    display: block;
    margin-left: 200px;
    margin-top:14px;
    float:left;
}
#search-area a.dropdown{
    cursor: pointer;
    width: 60px;
    height: 34px;
    display: block;
    line-height: 34px;
    position: relative;
    text-align: center;
    overflow: hidden;
    border:1px solid #d0d0d0;
    color:#5a5a5a;
    float:left;
    text-decoration: none;
    border-top-left-radius: 4px;
    border-bottom-left-radius: 4px;
}
#search-area a.dropdown span{
    display:block;
}
#search-area .search-input{
    width: 200px;
    border: 1px solid blue;
    float: left;
    border: 0;
    border-top: 1px solid #d0d0d0;
    border-bottom: 1px solid #d0d0d0;
    padding: 8px;
    height: 18px;
    display:block;
    color:#5a5a5a;
}
#search-area .search-btn{
    width: 40px;
    height: 34px;
    float: left;
    border: 1px solid #5a5a5a;
    display: block;
    color: #fff;
    background: #5a5a5a;
    line-height: 34px;
    text-align: center;
    font-size: 16px;
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
}

.main{
    min-height: 750px;
    padding-bottom: 60px;
    margin-left:auto;
    margin-right:auto;
    zoom: 1;
    box-sizing: border-box;
    padding-top: 65px;
}
.breadcrumbs{
    line-height: 30px;
    padding-bottom:20px;
    padding-top:20px;
    background:#fff;
    box-sizing: border-box;
}
.breadcrumbs a{
    color:#5a5a5a;
    text-decoration: none;
    transition: all .3s;
    display: inline-block;
    float:left;
    font-size:14px
}
.breadcrumbs .breadcrumbs-arrow{
    display:inline-block;
    padding:0 10px;
    float:left;
    color:#5a5a5a;
}
.breadcrumbs a:hover{
    color:#e22027;
}
.videos-list{
    margin-top:30px;
    margin-bottom: 30px;
}
.videos-item{
    float: left;
    width: 220px;
    padding: 7px 7px 10px;
    border: 1px solid transparent;
    position: relative;
    margin-right: 5px;
}
.videos-item:nth-of-type(5n+5){
    margin-right: 0
}
.videos-item a{
    text-decoration: none
}
.videos-item .videos-item-top{
    position: relative;
    overflow: hidden;
    width:220px;
    height:135px;
    border-radius: 6px;
}
.videos-item .videos-item-top img{
    position:absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.videos-item .videos-item-content{
    padding:8px;
}
.videos-item .videos-item-content .videos-item-name{
    font-size: 16px;
    color: #5a5a5a;
    line-height: 24px;
    word-wrap: break-word;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    max-height: 46px;
    transition: all .3s;
    width: 100%;
    float:left;
    margin-bottom: 8px
}
.videos-item:hover .videos-item-content .videos-item-name{
    color:#e22027
}
.videos-item .videos-item-content .videos-item-type{
    float:left;
    display:block;
    font-size: 12px;
    color: #8c8c8c;
}
.videos-item .videos-item-content .videos-item-publisher{
    float: right;
    display:block;
    font-size: 12px;
    color: #8c8c8c;
}
/* 底部 */
#footer{
    background:#5a5a5a !important;
    padding:30px 0;
    text-align: center
}
#footer .footer-link{
    display: inline-block;
    line-height: 0.5;
}
#footer a{
    float:left;
    color: #c1c1c1;
    font-size: 14px;
    text-decoration: none;
    transition: all .3s;
    margin-right: 15px;
}
#footer a:hover{
    color:#fff;
}
#footer a:last-child{
    position: relative;
}
#footer a:last-child .qrcode{
    position: absolute;
    width: 120px;
    height: 120px;
    background: #fff;
    border: 1px solid #eee;
    top: -145px;
    box-shadow: 0 -3px 8px 2px #eee;
    box-sizing: border-box;
    padding: 10px;
    left: -35px;
    display: none;
}
#footer a:last-child:hover .qrcode{
    display: block;
}
#footer a:last-child .qrcode::after{
    content: "";
    width: 0;
    height: 0;
    position: absolute;
    right: 0;
    left: 0;
    bottom: -12px;
    margin: auto;
    border-top: 12px solid #fff;
    border-left: 12px solid transparent;
    border-right: 12px solid transparent;
}
#footer a:last-child img{
    position:absolute;
    width: 100px;
    height:100px;
    top: 0;
    bottom:0;
    left:0;
    right:0;
    margin: auto;
}
#footer p{
    width:100%;
    color:#c1c1c1;
    font-size:14px;
    display:inline-block;
}
.sort-menu{
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
    background:#fff;
    box-sizing: border-box;
    padding:5px;
    font-size:14px;
    line-height: 35px;
}
.sort-menu-left{
    float:left;
    padding-left:15px;
    width:60px;
}
.sort-menu-right{
    float:left;
    width: 1080px;
}
.sort-menu-right a{
    color: #5a5a5a;
    text-decoration: none;
    transition: all .3s;
    display: inline-block;
    height: 100%;
    padding: 0 15px;
    margin: 0 4px;
}
.sort-menu-right a i{
    position: relative;
    top:1px;
}
.sort-menu-right a:hover,
.sort-menu-right a.active{
    color:#e22027;
}

.course-block{
    width:100%;
    padding:10px;
    background:#fff;
    margin-bottom:30px;
    box-sizing: border-box;
}
.course-block .inner-left{
    width:600px;
    height:350px;
    float:left;
    border:1px solid red;
}
.course-block .inner-right{
    width:550px;
    height:350px;
    float:right;   
}
.course-block .course-title{
    font-size: 22px;
    line-height: 1.2;
    margin-bottom: 10px;
    overflow : hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    font-weight: normal;
}
.inner-right .course-title-below{
    margin-bottom:20px;
}
.inner-right .course-title-below .line-item{
    line-height: 30px;
    float: left;
    color: #999;
    font-size:14px;
}
.inner-right .course-title-below .line-icon{
    float:left;
    width:1px;
    box-sizing: border-box;
    height:12px;
    margin: 9px 15px;
    background:#999;
}
.inner-right .course-title-below .line-item.collection i{
    margin-right:5px;
}
.inner-right .course-title-below .line-item.collection i.active{
    color:#e22027
}
.inner-right .course-title-below .line-item.collection{
    cursor: pointer;
}
.inner-right .course-desc{
    line-height: 35px;
    color: #a7a7a7;
    border: 1px solid #dcdcdc;
    padding-left: 10px;
    background: #f5f5f5;
    font-size: 16px;
    margin-bottom: 30px;
}
.inner-right .btn-once{
    background:#ff5158;
    color: #fff;
    padding: 10px 24px;
    border-radius: 4px;
    font-size: 20px;
    text-decoration: none;
}
.inner-right .btn-once:hover{
    background: #e22027;
}
.course-info{
    color: #5a5a5a;
    font-size: 14px;
}
.course-info .info-content{
    width:860px;
    float:right;
    background:#fff;
    padding: 0 0 30px;
    box-sizing: border-box;
}
.course-info .info-author{
    width:320px;
    min-height: 300px;
    float:left;
    background:#fff;
}
.info-author .author-avator{
    box-sizing: border-box;
    padding:10px;
}
.info-author .author-avator a{
    color:#5a5a5a;
    transition: all .3s;
}
.info-author .author-avator a:hover{
    color:#e22027
}
.info-author .author-avator a .avator-img{
    display:block;
    float:left;
    width: 60px;
    height:60px;
    object-fit: cover;
    border-radius: 50%;
}
.info-author .author-avator a .avator-name{
    margin-left: 15px;
    margin-top: 9px;
    float: left;
    width: 220px;
    overflow: hidden;
    display: -webkit-box;
    text-overflow: ellipsis;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.info-author .author-intro{
    box-sizing: border-box;
    padding:10px;
}
.author-intro .intro-item{
    text-align: center;
    width:49%;
    float:left;
    margin: 3px 0;
}
.author-intro .intro-item-line{
    width:1px;
    height:30px;
    background:#dedede;
    float:left;
    margin-top:10px;
}
.author-intro .intro-item .data{
    color:#999;
}
.author-intro .intro-text{
    width:100%;
    float:left;
    padding:10px;
    box-sizing: border-box;
}
.info-content .tab-nav{
    line-height: 50px;
    height: 50px;
}
.tab-nav .tab-item{
    border-top: 3px solid #fff;
    line-height: 50px;
    padding: 0 40px;
    font-size: 16px;
    float: left;
    cursor: pointer;
    transition: all .3s;
    font-weight: normal
}
.tab-nav .tab-item:hover,
.tab-nav .tab-item.on{
    border-top: 3px solid #e22027;
    color:#e22027
}
.info-content .tab-content{
    width:100%;
    overflow: hidden;
    box-sizing: border-box;
}
.info-content .tab-content .content{
    min-height: 300px;
    padding:10px 20px;
}
.tab-content .content.comment li{
    border-bottom:1px solid #eee;
    overflow: hidden;  
    padding-bottom:10px;
}
.content.comment .comment-left{
    width:80px;
    box-sizing: border-box;
    float:left;
    text-align: center;
    margin-top:10px;
}
.content.comment .comment-left img{
    display: inline;
    width: 50px;
    border-radius: 50%;
    height: 50px;
}
.content.comment .comment-left p{
    margin-top:5px;    
    display: inline-block;
}
.content.comment .comment-right{
    float:left;
    margin-left:30px;
    width:700px;
    padding:10px 0;
    font-size:14px;
}
.content.comment .comment-right .comment-star{
}
.content.comment .comment-right .comment-desc{
    margin-bottom:10px;
}
.content.comment .comment-right .comment-date{
    color:#999
}
.content.resource .resoure-list{
    width:100%;
    text-align: center;
    color: #5a5a5a;
    border:1px solid #eee;
}
.content.resource .resoure-list .r-thead{
    width:100%;
    background:#eee;
}
.content.resource .resoure-list .r-td{
}
.content.resource .resoure-list .r-thead>div,
.content.resource .resoure-list .r-td>div{
    box-sizing: border-box;
    padding:6px 20px;
}
.content.resource .resoure-list .r-th{
    width:580px;
    text-align: left;
    float:left;
}
.content.resource .resoure-list .r-th-sm{
    width:120px;
    float:left;
    box-sizing: border-box;
}
.content.resource .resoure-list .r-thead .r-th-sm{
    border-left:1px solid #fff;
}
.content.resource .resoure-list a{
    color: #5a5a5a;
    width:100%;
    display:block;
    
}